gopher1.pl

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description
owner Johannes Waldmann
uploaded 2017-08-17 03:45:17.0
disk size 333 Bytes
downloadable true
type
attribute value
name no_type
processor id 1
description this is the default benchmark type for rejected benchmarks and benchmarks that are not associated with a type.
owning community none
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% Adapted from LP/SGST06/gopher.pl
% terminating

%query: gopher(i,o).
gopher(nil,L) :- !, eq(L,nil).
gopher(X,Y) :- head(X,nil), !, tail(X,T), eq(Y,cons(nil,T)).
gopher(X,Y) :- head(X,H), head(H,U), tail(H,V), tail(X,W), gopher(cons(U,cons(V,W)),Y).

head([],_).
head([X|_],X).

tail([],[]).
tail([_|X],X).

eq(X,X).
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